/**
   * Copyright (c) 2014 Redpine Signals Inc.
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include "rsi_debugfs.h"
  #include "rsi_sdio.h"
  
  /**
   * rsi_sdio_stats_read() - This function returns the sdio status of the driver.
   * @seq: Pointer to the sequence file structure.
   * @data: Pointer to the data.
   *
   * Return: 0 on success, -1 on failure.
   */
  static int rsi_sdio_stats_read(struct seq_file *seq, void *data)
  {
  	struct rsi_common *common = seq->private;
  	struct rsi_hw *adapter = common->priv;
  	struct rsi_91x_sdiodev *dev =
  		(struct rsi_91x_sdiodev *)adapter->rsi_dev;
  
  	seq_printf(seq, "total_sdio_interrupts: %d
  ",
  		   dev->rx_info.sdio_int_counter);
  	seq_printf(seq, "sdio_msdu_pending_intr_count: %d
  ",
  		   dev->rx_info.total_sdio_msdu_pending_intr);
  	seq_printf(seq, "sdio_buff_full_count : %d
  ",
  		   dev->rx_info.buf_full_counter);
  	seq_printf(seq, "sdio_buf_semi_full_count %d
  ",
  		   dev->rx_info.buf_semi_full_counter);
  	seq_printf(seq, "sdio_unknown_intr_count: %d
  ",
  		   dev->rx_info.total_sdio_unknown_intr);
  	/* RX Path Stats */
  	seq_printf(seq, "BUFFER FULL STATUS  : %d
  ",
  		   dev->rx_info.buffer_full);
  	seq_printf(seq, "SEMI BUFFER FULL STATUS  : %d
  ",
  		   dev->rx_info.semi_buffer_full);
  	seq_printf(seq, "MGMT BUFFER FULL STATUS  : %d
  ",
  		   dev->rx_info.mgmt_buffer_full);
  	seq_printf(seq, "BUFFER FULL COUNTER  : %d
  ",
  		   dev->rx_info.buf_full_counter);
  	seq_printf(seq, "BUFFER SEMI FULL COUNTER  : %d
  ",
  		   dev->rx_info.buf_semi_full_counter);
  	seq_printf(seq, "MGMT BUFFER FULL COUNTER  : %d
  ",
  		   dev->rx_info.mgmt_buf_full_counter);
  
  	return 0;
  }
  
  /**
   * rsi_sdio_stats_open() - This funtion calls single open function of seq_file
   *			   to open file and read contents from it.
   * @inode: Pointer to the inode structure.
   * @file: Pointer to the file structure.
   *
   * Return: Pointer to the opened file status: 0 on success, ENOMEM on failure.
   */
  static int rsi_sdio_stats_open(struct inode *inode,
  			       struct file *file)
  {
  	return single_open(file, rsi_sdio_stats_read, inode->i_private);
  }
  
  /**
   * rsi_version_read() - This function gives driver and firmware version number.
   * @seq: Pointer to the sequence file structure.
   * @data: Pointer to the data.
   *
   * Return: 0 on success, -1 on failure.
   */
  static int rsi_version_read(struct seq_file *seq, void *data)
  {
  	struct rsi_common *common = seq->private;
  
  	common->driver_ver.major = 0;
  	common->driver_ver.minor = 1;
  	common->driver_ver.release_num = 0;
  	common->driver_ver.patch_num = 0;
  	seq_printf(seq, "Driver : %x.%d.%d.%d
  LMAC   : %d.%d.%d.%d
  ",
  		   common->driver_ver.major,
  		   common->driver_ver.minor,
  		   common->driver_ver.release_num,
  		   common->driver_ver.patch_num,
  		   common->fw_ver.major,
  		   common->fw_ver.minor,
  		   common->fw_ver.release_num,
  		   common->fw_ver.patch_num);
  	return 0;
  }
  
  /**
   * rsi_version_open() - This funtion calls single open function of seq_file to
   *			open file and read contents from it.
   * @inode: Pointer to the inode structure.
   * @file: Pointer to the file structure.
   *
   * Return: Pointer to the opened file status: 0 on success, ENOMEM on failure.
   */
  static int rsi_version_open(struct inode *inode,
  				 struct file *file)
  {
  	return single_open(file, rsi_version_read, inode->i_private);
  }
  
  /**
   * rsi_stats_read() - This function return the status of the driver.
   * @seq: Pointer to the sequence file structure.
   * @data: Pointer to the data.
   *
   * Return: 0 on success, -1 on failure.
   */
  static int rsi_stats_read(struct seq_file *seq, void *data)
  {
  	struct rsi_common *common = seq->private;
  
  	unsigned char fsm_state[][32] = {
  		"FSM_CARD_NOT_READY",
  		"FSM_BOOT_PARAMS_SENT",
  		"FSM_EEPROM_READ_MAC_ADDR",
  		"FSM_RESET_MAC_SENT",
  		"FSM_RADIO_CAPS_SENT",
  		"FSM_BB_RF_PROG_SENT",
  		"FSM_MAC_INIT_DONE"
  	};
  	seq_puts(seq, "==> RSI STA DRIVER STATUS <==
  ");
  	seq_puts(seq, "DRIVER_FSM_STATE: ");
  
  	if (common->fsm_state <= FSM_MAC_INIT_DONE)
  		seq_printf(seq, "%s", fsm_state[common->fsm_state]);
  
  	seq_printf(seq, "(%d)
  
  ", common->fsm_state);
  
  	/* Mgmt TX Path Stats */
  	seq_printf(seq, "total_mgmt_pkt_send : %d
  ",
  		   common->tx_stats.total_tx_pkt_send[MGMT_SOFT_Q]);
  	seq_printf(seq, "total_mgmt_pkt_queued : %d
  ",
  		   skb_queue_len(&common->tx_queue[MGMT_SOFT_Q]));
  	seq_printf(seq, "total_mgmt_pkt_freed  : %d
  ",
  		   common->tx_stats.total_tx_pkt_freed[MGMT_SOFT_Q]);
  
  	/* Data TX Path Stats */
  	seq_printf(seq, "total_data_vo_pkt_send: %8d\t",
  		   common->tx_stats.total_tx_pkt_send[VO_Q]);
  	seq_printf(seq, "total_data_vo_pkt_queued:  %8d\t",
  		   skb_queue_len(&common->tx_queue[VO_Q]));
  	seq_printf(seq, "total_vo_pkt_freed: %8d
  ",
  		   common->tx_stats.total_tx_pkt_freed[VO_Q]);
  	seq_printf(seq, "total_data_vi_pkt_send: %8d\t",
  		   common->tx_stats.total_tx_pkt_send[VI_Q]);
  	seq_printf(seq, "total_data_vi_pkt_queued:  %8d\t",
  		   skb_queue_len(&common->tx_queue[VI_Q]));
  	seq_printf(seq, "total_vi_pkt_freed: %8d
  ",
  		   common->tx_stats.total_tx_pkt_freed[VI_Q]);
  	seq_printf(seq,  "total_data_be_pkt_send: %8d\t",
  		   common->tx_stats.total_tx_pkt_send[BE_Q]);
  	seq_printf(seq, "total_data_be_pkt_queued:  %8d\t",
  		   skb_queue_len(&common->tx_queue[BE_Q]));
  	seq_printf(seq, "total_be_pkt_freed: %8d
  ",
  		   common->tx_stats.total_tx_pkt_freed[BE_Q]);
  	seq_printf(seq, "total_data_bk_pkt_send: %8d\t",
  		   common->tx_stats.total_tx_pkt_send[BK_Q]);
  	seq_printf(seq, "total_data_bk_pkt_queued:  %8d\t",
  		   skb_queue_len(&common->tx_queue[BK_Q]));
  	seq_printf(seq, "total_bk_pkt_freed: %8d
  ",
  		   common->tx_stats.total_tx_pkt_freed[BK_Q]);
  
  	seq_puts(seq, "
  ");
  	return 0;
  }
  
  /**
   * rsi_stats_open() - This funtion calls single open function of seq_file to
   *		      open file and read contents from it.
   * @inode: Pointer to the inode structure.
   * @file: Pointer to the file structure.
   *
   * Return: Pointer to the opened file status: 0 on success, ENOMEM on failure.
   */
  static int rsi_stats_open(struct inode *inode,
  			  struct file *file)
  {
  	return single_open(file, rsi_stats_read, inode->i_private);
  }
  
  /**
   * rsi_debug_zone_read() - This function display the currently enabled debug zones.
   * @seq: Pointer to the sequence file structure.
   * @data: Pointer to the data.
   *
   * Return: 0 on success, -1 on failure.
   */
  static int rsi_debug_zone_read(struct seq_file *seq, void *data)
  {
  	rsi_dbg(FSM_ZONE, "%x: rsi_enabled zone", rsi_zone_enabled);
  	seq_printf(seq, "The zones available are %#x
  ",
  		   rsi_zone_enabled);
  	return 0;
  }
  
  /**
   * rsi_debug_read() - This funtion calls single open function of seq_file to
   *		      open file and read contents from it.
   * @inode: Pointer to the inode structure.
   * @file: Pointer to the file structure.
   *
   * Return: Pointer to the opened file status: 0 on success, ENOMEM on failure.
   */
  static int rsi_debug_read(struct inode *inode,
  			  struct file *file)
  {
  	return single_open(file, rsi_debug_zone_read, inode->i_private);
  }
  
  /**
   * rsi_debug_zone_write() - This function writes into hal queues as per user
   *			    requirement.
   * @filp: Pointer to the file structure.
   * @buff: Pointer to the character buffer.
   * @len: Length of the data to be written into buffer.
   * @data: Pointer to the data.
   *
   * Return: len: Number of bytes read.
   */
  static ssize_t rsi_debug_zone_write(struct file *filp,
  				    const char __user *buff,
  				    size_t len,
  				    loff_t *data)
  {
  	unsigned long dbg_zone;
  	int ret;
  
  	if (!len)
  		return 0;
  
  	ret = kstrtoul_from_user(buff, len, 16, &dbg_zone);
  
  	if (ret)
  		return ret;
  
  	rsi_zone_enabled = dbg_zone;
  	return len;
  }
  
  #define FOPS(fopen) { \
  	.owner = THIS_MODULE, \
  	.open = (fopen), \
  	.read = seq_read, \
  	.llseek = seq_lseek, \
  }
  
  #define FOPS_RW(fopen, fwrite) { \
  	.owner = THIS_MODULE, \
  	.open = (fopen), \
  	.read = seq_read, \
  	.llseek = seq_lseek, \
  	.write = (fwrite), \
  }
  
  static const struct rsi_dbg_files dev_debugfs_files[] = {
  	{"version", 0644, FOPS(rsi_version_open),},
  	{"stats", 0644, FOPS(rsi_stats_open),},
  	{"debug_zone", 0666, FOPS_RW(rsi_debug_read, rsi_debug_zone_write),},
  	{"sdio_stats", 0644, FOPS(rsi_sdio_stats_open),},
  };
  
  /**
   * rsi_init_dbgfs() - This function initializes the dbgfs entry.
   * @adapter: Pointer to the adapter structure.
   *
   * Return: 0 on success, -1 on failure.
   */
  int rsi_init_dbgfs(struct rsi_hw *adapter)
  {
  	struct rsi_common *common = adapter->priv;
  	struct rsi_debugfs *dev_dbgfs;
  	char devdir[6];
  	int ii;
  	const struct rsi_dbg_files *files;
  
  	dev_dbgfs = kzalloc(sizeof(*dev_dbgfs), GFP_KERNEL);
  	if (!dev_dbgfs)
  		return -ENOMEM;
  
  	adapter->dfsentry = dev_dbgfs;
  
  	snprintf(devdir, sizeof(devdir), "%s",
  		 wiphy_name(adapter->hw->wiphy));
  
  	dev_dbgfs->subdir = debugfs_create_dir(devdir, NULL);
  
  	if (!dev_dbgfs->subdir) {
  		kfree(dev_dbgfs);
  		return -ENOMEM;
  	}
  
  	for (ii = 0; ii < adapter->num_debugfs_entries; ii++) {
  		files = &dev_debugfs_files[ii];
  		dev_dbgfs->rsi_files[ii] =
  		debugfs_create_file(files->name,
  				    files->perms,
  				    dev_dbgfs->subdir,
  				    common,
  				    &files->fops);
  	}
  	return 0;
  }
  EXPORT_SYMBOL_GPL(rsi_init_dbgfs);
  
  /**
   * rsi_remove_dbgfs() - Removes the previously created dbgfs file entries
   *			in the reverse order of creation.
   * @adapter: Pointer to the adapter structure.
   *
   * Return: None.
   */
  void rsi_remove_dbgfs(struct rsi_hw *adapter)
  {
  	struct rsi_debugfs *dev_dbgfs = adapter->dfsentry;
  
  	if (!dev_dbgfs)
  		return;
  
  	debugfs_remove_recursive(dev_dbgfs->subdir);
  }
  EXPORT_SYMBOL_GPL(rsi_remove_dbgfs);